Headlight.



0. WINSTON.

HEADLIGHT.

APPLICATION FILED MAY3I. l9l6- RENEWED FEB. 16. IQIB.

Patented Sept. 17, 1918.

OVERTON WINSTON, OF MINNEAPOLIS, MINNESOTA.

HEADLIGHT.

Application filed May 31. 1916. Serial No. 100.825.

To (1H whom it may concern:

Be it known that I. OvERTox \VIxsTox, a citizen of the ['nited States. residing at Minneapolis. in the county of Hennepin and State of )Iinnesota, have invented certain new and useful Improvements in Headlights: and I do hereby declare the following to be a full, clear. and exact description of the invention. such as. will enable others skilled in the art to which it appertains to make and use the same.

My present invention relates to headlights for automobiles or other vehicles, and is in the nature of or an improvement on or modification of certain of the contact devices disclosed in my prior application S. N. 9l.:2-26 filed of date. April 11. 1916, and entitled 'Headlight."

More particularly. the invention relates to the improved arrangement of the contact device in the socket and on the shank of a twofilament electric light bulb.

In the accompanying drawings which illustrate the invention. like characters indicate like parts throughout the several views.

Referring to the drawings:

Figure 1 is a vertical section with some parts broken awayQshowing the reflector, the lamp socket and light bulb;

Fig. :2 is a rear elevation of the shankof the light bulb; and v Fig. 3 is a fragmentary section of the front or contact end of one of the contact springs of the socket. I a v The light bulb 1 has two filaments 2 and 2. the outer ends of which are connected, respectively, to electrodes 3 and 4, and the inner ends of which are connected to an intermediate electrode 5, which electrodes are insulated from each other and supported by the shank of. the light bulb. The shank of the light bulb has an axial contact 6 and two diametrically opposite segmental contacts 7 located in the rear end of its shank with the said contact 7 concentrically located around the said axial contact 6. These two contacts 7 are electrically connected. as shown. by a wire 7. and are. of course, insulated from the axial contact 6. The shank of the light bulb is surrounded by a metallic sleeve 8 that constitutes the outer contact of the light bulb and is electrically connected to the lower electrode 3. The electrode 5 is electrically connected to the axial contact 6,

and the electrode 4 is electrically connectcumferentially. spaced contacts 4.

Specification of Letters Patent. Patented Sept. 17, 1918.

Renewed February 16. 1918. Serial No. 217,714.

ed to the segmental contact 7 as shown, through the wire 7 (see Fig. 1).

The filament 2 has its hot spot at the axis of the light bulb and the filament 2 has its hot spot ofisetfrom said axis.

In the construction shown, the reflector 9 is surrounded by a flanged internally-tln'eaded annular anchoring plate 10. The metallic contact sleeve 8 of the light bulb is shown as provided with radially projecting lugs 11 adapted to be inserted through internal longitndinal grooves of the lamp holding collar 13, and. to be engaged withha serrated internal shoulder of the said collar, all as more fully illustrated in my said prior-applica- -tion above identified. The collar 13 is holding collar 13 is provided with a center-- ing ring 15 of insulating material.

In the outer end of the socket tube 14 is an insulating block 16 and supported by and projected axially therefrom is a forwardly spring pressed contact plunger 17, the head of which is normally spring pressed into contact with the axial contact 6 of the light bulb. The numeral 18 indicates a coiled contact spring which reacts against the insulating block-16 and is' extended through a centering ring 15 and normally engages always with at leastone of the cir- Here it is important to note that the front end. of the said contact spring (see Fig. 3), is provided with a curvedcontactengaging por-, tion, substantially of the extent shown in Fig. 3. that is. in a plane at a right angle out of contact or small area.

- 15 and assists in contacts in all adjustments of the light bulb, obviates the necessity of a complete annular contact on the end of the shank of the light bulb, and furthermore, affords a good bearing for the said spring in which the force of the spring is not exerted on a single point In r'act, it is an easier matter, in practice, to properly apply the cir- I cumferentially spaced contacts 7 to the end.

is to properly apply a r of the bulb, than it continuous or annular contact, such as used in my said prior application.

-The insulating centering collar 15, as shown, is frictionally secured to and rotated with the holding collar of the lamp socket and it serves to hold the contact spring 18 with the surrounding portions of the lamp socket and alined with the contact 7 A pressed between the insulating block 16 and the flanged rear end of the centering ring holding the lamp holding. collar 13 of the socket against unintentional rotation. The contact sleeve 8, the contact plunger 17 and the contact spring 18 are connected, respectively, to lead wires 20, 22 and 21, of the three the lead 22 is common to both circuits.

What I claim is: 1. A two-filament electric light bulb provided on its shank with a surrounding con- 7 tact sleeve-and at the end of its shank with an axial contact. and with circfumferentially spaced electrically connected contacts, in

short colled spring 19 is com-,

wire lamp circuit in which combination with a lamp socket having eleo trica'l contact with the surrounding sleeve of said light bulb, and provided with an axial contact engageable with the axial contact of said bulb, and having a contact spring surrounding said axial contact and provided with afront end portion engageable with the said circumferentially spaced contacts of Y said bulb.-,:

2. A two-filament electric light bulb provided on its shank with a surrounding contact sleeve and atthe end of its'shank with an axial contact and with circumferentially spaced electrically connected contacts, m

combination with a lamp socket having electrical contact with the surrounding sleeve of said light bulb and provided with an axial contact engageable with the axial contact of said bulb, and having a contact spring surrounding saidaxial contact and provided with afront end portion engageable with the said circumferentially spaced contacts of said bulb, the said front end of said contact spring, through an are greater than the distance between the said circumferentially spaced contacts, with which it engages, being bent into a plane that is at a right angle to the axls of said socket.

. In testimony whereof I aflix my signature in presence of two witnesses. OVERTON WINSTON. Witnesses:

BERNICE G. WHEELER,

' HARRY D. KILGORE. 

